Extreme bushfire conditions have been declared for the Adelaide Hills and South Australia's southeast as the state nears the end of a week-long heatwave.
Temperatures are forecast to reach 40C in Adelaide on Friday and will push higher in some regional centres.
The Bureau of Meteorology says Saturday will be just as hot ahead of a cool change and milder conditions on Sunday.
As well as warning of extreme bushfire conditions in the two districts, the Country Fire Service says conditions will be severe in five more districts from the west coast to Kangaroo Island.
The State Emergency Service has also issued an extreme heatwave warning for SA, calling on people to take measures to keep cool.
Adelaide's temperatures have topped 35C all week, making it the longest hot spell of the summer.